Abstract
The competitive adsorption of Trichoderma viride cellulase components to leaf litter was investigated to further elucidate the role of extracellular enzymes as mediators of decomposition processes. Litter analogs were prepared by acid-detergent digestion of senescent Pinus strobus (white pine), Quercus prinus (chestnut oak) and Cornus florida (flowering dogwood) leaves. Enzymatic cellulose digestion was used to produce litter analogs of higher lignin content. The white pine litter analogs had a high affinity for exocellulase and β-glucosidase. Chestnut oak litter preferentially bound endocellulase components and flowering dogwood litter displayed intermediate trends. Natural mixed-deciduous and white pine litters and humus had less capacity for immobilizing cellulase components. The adsorption data are consistent with available information on the binding of cellulase components to purified cellulose and with information on the cellulase activity patterns of decomposing leaf litter.
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